Search results for query: *

Is there any way to determine if and where previous versions of an application have been installed?

Hi everyone. I get the error: "Data type mismatch in criteria expression", whenever I try to insert a record that contains an empty string value in one of it's fields. I'm using MS Access as the database, and I know the error is due to the fact that Access is very stronly typed. Is there a...

Hi everyone. I need to use arraylists as datasources for a few crysal reports. (These arraylists will be populated during run-time). I can not connect the crystal reports directly to the database or a dataset for that matter, because I am using multi-tier development. In other words, I have...

Does anyone know of a way to get the next "autonumber" ( or the last one that was created) in MSAccess using VB.Net? It would really save me a few hundred lines of programming. Thanx in advance.

I have a button which executes the following (pseudo) code when clicked: dim tmp as new employee tmp.Name = txtName.text tmp.Surname = txtSurname.text Arraylist1.add(tmp) ... 'do something that calls each element of Arraylist1 Now, the code executes perfectly the first time. The second time I...

Hi guys. When binding a datagrid to an arraylist I receive a message that says: system.argumenterror - cannot create a child list for "EMPLOYEE". Usually i just say: datagrid.dataource = arraylistname datagrid.datamember = nameOfAListElementsType I've tried the setdatabinding equivalent but...

Firstly, do anyone know of good tutorials/source code for programming a fingerprint scanner in vb.net? I'm also looking for advice/tutorials/source code on generating e-mails. Lastly, is it possible to convert crystal reports and word documents to pdf? If yes, then how? Again, source code or...

1. How do I create an "autorun" so that a specific program on a cd starts running automatically after it is placed in the cd-player? 2. Does anyone know of a good tutorial on writing a custom-made installer? You know, dynamically creating shortcuts and that kind of stuff? Thanx

Is it possible to manually create/define more than one resx for one form, and then to choose the applicable resx during run-time? If so... How?

I develop some of my own controls and furthermore make quite extensive use of VBPowerpack. My progs also have to provide language-support and be localizable, and this is where the problem lies. When localizing a form, all the standard controls work perfectly. VBpowerpack components and my own...

How do you insert a row into a table object? I need to read data from the database into a table and then add a row of custom data into the table-object. Any examples would be great!

A brief overview of what my program must do: My program must enable users to select multiple records from a datagridby pressing the ctrl-key and clicking on the record. When more than onerecord is displayed, a topmost-form appears which lists the recordsthat are selected. The content from the...

Im having some trouble parsing a date to a required format. I am aware of the Date.ParseExact() method, but I am not sure how touse it. To be more precise, I am not familiar with the parametertypes required by the method. The format I want to parse the date/string into is: dd/mm/yyyy Any...

When trying to compile my project, the following error message appears: "An unhandled exception of type 'System.IO.FileNotFoundException' occurred in LoneBewerker2004.exe Additional information: File or assembly name System.Data, or one of its dependencies, was not found." It highlights the...

Under the JOBS segment there is a post from "anniefromgreensprings" or something. Today is 26/10/2004 but the date posted reads as "06-11-2004". That's a few days into the future...

I have quite the crisis. I was working on a project, which used the vbpowerpack's controls. All of the sudden, the controls dissapeared from the form! Now it keeps on throwing messages that say the controls don't exist! However, when I run the program the controls do display? Can anyone...

The following code exist inside an event-handler for a button: "Dim frmAdd as New frmAdd frmAdd.Parent = Me frmAdd.ShowDialog()" I get the following error message when I press the button during run-time: "An unhandled exception of type 'System.ArgumentException' occured in...

I have a datagrid on my main-window (which is always active until the appliction terminates). Is it possible to update & refresh those datagrids from other forms (which are activated from buttons clicked on the main-window). Here is some pseudo-code to explain how I activated the other forms...

I'm wondering if there's a way to prevent a datagrid from displaying children-records (the little plus-boxes on the vertical headers). I created two datasets with a master-detail relationship. My problem is this... I only want to display the master-table in the datagrid, the child-table's...

Hi. Me again. I know I've been posting a lot, but I have been working hard! :) Can anyone tell me how to read a single value from your database into a string variable? Again, a simple example would suffice.